services/datalab-webapp-common/src/main/java/com/epam/datalab/rest/mappers/RuntimeExceptionMapper.java
/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.epam.datalab.rest.mappers;

import com.epam.datalab.rest.dto.ErrorDTO;
import lombok.extern.slf4j.Slf4j;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.Provider;

@Provider
@Slf4j
public class RuntimeExceptionMapper extends GenericExceptionMapper<RuntimeException> {

    @Override
    public Response toResponse(RuntimeException exception) {
        if (exception instanceof WebApplicationException) {
            return handleWebApplicationException(exception);
        }
        return super.toResponse(exception);
    }

    private Response handleWebApplicationException(RuntimeException exception) {
        WebApplicationException webAppException = (WebApplicationException) exception;

        if (webAppException.getResponse().getStatusInfo() == Response.Status.UNAUTHORIZED
                || webAppException.getResponse().getStatusInfo() == Response.Status.FORBIDDEN) {

            return web(exception, Response.Status.UNAUTHORIZED);
        } else if (webAppException.getResponse().getStatusInfo() == Response.Status.NOT_FOUND) {
            return web(exception, Response.Status.NOT_FOUND);
        }

        return super.toResponse(exception);
    }

    private Response web(RuntimeException exception, Response.StatusType status) {
        log.error("Web application exception: {}", exception.getMessage(), exception);
        return Response.status(status)
                .type(MediaType.APPLICATION_JSON)
                .entity(new ErrorDTO(status.getStatusCode(), exception.getMessage()))
                .build();
    }
}
